Download BOM as a .xlsx spreadsheet and import it into Mouser. Everything (except the LED's) can be bought at Mouser. If you purchase the Pre-Programmed Chips from here, delete the ATMega644p and 512kb EEPROM from the BOM.

SILKSCREEN ERROR

2 values were not printed on the PCB

D1: 1N4148 Diode

R1: 10k Resistor

SAFETY PRECAUTIONS

If you are using the Control PCB with the 4PM Filter PCB, it is a good idea to trim the switch and resistor array legs that will sit just above the voltage regulators on the 4PM PCB. Do this before joining the 2 boards together. Maybe even put a small bit of electrical tape, or the like over the cut leads, just to be safe.